Accrued Expenses And Other Liabilities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012 item	Dec. 31, 2011 item
Schedule Of Other Liabilities [Line Items]
Total other current liabilities	$ 14,007	$ 195,690
Number of towers acquired	2,502	6,630	1,085
Brazilian Acquisiton [Member]
Schedule Of Other Liabilities [Line Items]
Total other current liabilities		$ 177,500
Number of towers acquired	800